
| Characteristic | 2017 | 2018 |
|---|---|---|
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
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Source
Release date
December 2018
Region
Worldwide
Survey time period
August 2018
Number of respondents
2017 (n = 222), 2018 (n = 400)
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